FLUX 3 Video Extend Draft: AI Video Editor
Fast, lower-cost draft mode of FLUX 3 Video Extend for testing continuity and camera movement. Try free — pay per generation, no subscription.
Fast, lower-cost draft mode of FLUX 3 Video Extend for testing continuity and camera movement. Try free — pay per generation, no subscription.
About this model
FLUX 3 Video Extend Draft is a fast, lower-cost draft mode for testing continuity, camera movement, and visual consistency before extending a clip with FLUX 3 Video Extend. It generates a prompt-guided draft extension of an existing MP4 clip, letting you validate the direction of a continuation before spending on the full-quality version.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $0.09/sec flat | Pay-per-generation pricing, no subscription required. Audio generation included at no extra charge. |
| Fal.ai | Not available | FLUX 3 Video Extend Draft is not yet listed on Fal.ai. |
| Replicate | Not available | FLUX 3 Video Extend Draft is not yet listed on Replicate. |
Pay-per-generation pricing, no subscription required. Audio generation included at no extra charge.
FLUX 3 Video Extend Draft is not yet listed on Fal.ai.
FLUX 3 Video Extend Draft is not yet listed on Replicate.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| Prompt | string | Describe the next action, scene development, camera movement, mood, lighting, and visual continuity. | The camera pulls back to reveal a sunrise breaking over the skyline, birds taking flight. |
| Video URL | string | URL of the source video to extend. Must be under 50 MB and under 15 seconds. | https://d3adwkbyhxyrtq.cloudfront.net/webassets/videomodels/flux-3-video.mp4 |
| Aspect Ratio | Enum (6 options) | Aspect ratio of the output video. | - |
| Duration | int | Draft extension length in seconds. | 5 |
| Generate Audio | boolean | Whether to generate synchronized native audio for the draft extension. | true |
Describe the next action, scene development, camera movement, mood, lighting, and visual continuity.
The camera pulls back to reveal a sunrise breaking over the skyline, birds taking flight.URL of the source video to extend. Must be under 50 MB and under 15 seconds.
https://d3adwkbyhxyrtq.cloudfront.net/webassets/videomodels/flux-3-video.mp4Aspect ratio of the output video.
-Draft extension length in seconds.
5Whether to generate synchronized native audio for the draft extension.
trueDeveloper documentation
Provide a source video — an MP4 under 50 MB and under 15 seconds, via video_url.
Write a continuation prompt — describe the next action, scene development, camera movement, mood, lighting, and visual continuity.
Set duration for the draft extension (5–20 seconds).
Toggle generate_audio for synchronized native audio at no extra charge.
Submit the request:
curl -X POST https://api.muapi.ai/api/v1/flux-3-video-extend-draft \
-H "x-api-key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"prompt": "The camera pulls back to reveal a sunrise breaking over the skyline", "video_url": "https://example.com/clip.mp4", "duration": 5, "generate_audio": true}'
/api/v1/predictions/{request_id}/result until completed, then re-run the winning direction on FLUX 3 Video Extend for a final-quality extension.Frequently asked
A fast, lower-cost draft mode of FLUX 3 Video Extend, for testing continuity, camera movement, and visual consistency before a final-quality extension.
The source clip must be an MP4 under 50 MB and under 15 seconds long, same as the standard Video Extend endpoint.
Muapi bills $0.09/second flat, rounded up to the next whole second, capped at 20 seconds — a 5-second draft extension costs $0.45.
Yes, synchronized native audio for the extended portion can be toggled with `generate_audio` at no extra charge.
Yes — feed the output back in as the `video_url` of the next call, then finalize the winning direction with [FLUX 3 Video Extend](/playground/flux-3-video-extend).